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CVE: CVE-2020-29074
Upstream-Status: Backport [https://github.com/LibVNC/x11vnc/commit/69eeb9f7baa14ca03b16c9de821f9876def7a36a ]
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
From 69eeb9f7baa14ca03b16c9de821f9876def7a36a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gu=C3=A9nal=20DAVALAN?= <guenal.davalan@uca.fr>
Date: Wed, 18 Nov 2020 08:40:45 +0100
Subject: [PATCH] scan: limit access to shared memory segments to current user
---
src/scan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/scan.c b/src/scan.c
index 43e00d20..12994d52 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -320,7 +320,7 @@ static int shm_create(XShmSegmentInfo *shm, XImage **ximg_ptr, int w, int h,
#if HAVE_XSHM
shm->shmid = shmget(IPC_PRIVATE,
- xim->bytes_per_line * xim->height, IPC_CREAT | 0777);
+ xim->bytes_per_line * xim->height, IPC_CREAT | 0600);
if (shm->shmid == -1) {
rfbErr("shmget(%s) failed.\n", name);
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